Loom



May 6 1924,

l ,493,073 w. GLEDHELL v LOOM Filed Dec. 26. 1922 2 Sheets-Sheet 1 F1 G. i. 4

ENVENTOR.

Ma 6','1924. U f 1,493,073,

. W. GLEDHILL Lo om Filed Dec. 26, 1922 2 Sheets-Sheet a LNVENTOR. m r

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i 1 I a 'WILLXAM GLEDHELL 01% BLACKBEJ'EH, ENfiLATND.

Application filed lilccemher To all whom-it may cancer-'11:

Be itlrncwn that 1, WILLIAM Gnaminin, asuloject of the King of Great Britani and Ireland, residing at Blackburn, England, have invented certain new and useful In provements in Looms, of which the follow is a specification,

This invention relates to a loom weighting motion; and it consists in the novel construction and combination or" the parts hereinafter fully described and claimed whereby the normal tension of the warp threads is released at intervals, and is allowed to come on again, as required.

In order that the said invention may be clearly understood and readily carried -into efi'ect, the same is described more fully with reference to the accompanying drawings, wherein Fig. 1 is a rear view, and Fig. 2 an end view of part of a loom with the invention applied thereto, and

Fig. 3 is an end view shewing a modification.

The whip roll A is bolted to two twoarnied levers a in such'manner that it can be adjusted towards and away from the centres a oi such levers. Attached to the latter are screwed rods terminating in hooks a for attachment to ropes or chains 1; which pass around the necks or ruilles or the warp henm B. 'Vhen weaving light cloth, springs such a may be interposed between the levers a and adjusting nuts 0: to iakeup any slaclrness in the chains and help the oscillatory movement of the warp heain caused by the opening and closing of the shed and at the same time to minimize the movement of the whip roll. When heavy cloth is being woven the springs a can be dispensed with. The lower ends of the ropes or chains 1) after being coiled around the necks or ruilles of the warp beam are at tached to a bar O that is cranked at its ends and mounted in levers D. In the modification shewn in Figs. 1 and 2 these lovers are pivoted at d and connected by links d and springs 03 with the front ends of the levers a. The-levers D operate in conjunction with strong springs d which ofi'er resistance to their upward movement and to enable the weight to; be taken off the ropes, or chains 6 when it is re uired to turn the beam back, or remove it, t e cranked rod G is provided with a handle a which can be turned to raise the rod and so take the tension 05 the ropes-or ehains. During the process of weaving; each time the shed is completing its opening movement after the beat up, the pull on the warp threads turns the warp heein forward thereby raising the levers D slightly and taking a certain. amount oi compression. 0d" the spring d. This relieves the drag on the ruliles sufiiciently to prevent extra tension or strain being put upon the warp threads as the shed is continuing to open after the heat up, with the result that less breakages of warp threads occur and the output of the loom is increased. In the modificaticn shewn in Fig. 3 the lever B is pivoted interniediately of its length and is provided as its front end with a weightd which can be adjusted to any required position along the lever.

The normal tension of the warp threads is relieved at intervals and ellowed. to come on again when required. In Figs. 1 and 2 this is ei fected by a cam E engaging a roll er a on a lever c that is rigidly fixed on. a rock shaft e sheft extends across the loom and is free to turn in hearings e Rigidly secured to the rock shaft .9 outside I each loom end frame is an arm 6* connected by a link a to the lever B. W'l'ien the loom is in motion the cam lE imparts a slight oscillating motion to the lever B and. such am is so shaped and timed as to relieve the tension during the opening of the shed and. restore it when the shed is closed. In the modification shewn in 3 the lever e is extended to engage a roller 6' mounted on a. bracket 8 that is attached to one of the sley swords F, the arrangement being such that as the sley goes back the roller e travels over an incline e on the lever 8 and so depresses thelatter thereby temporarilytaking the off the chain b.'

By the invention described, when the shed is open, there is less weight on the healds and warp threads owing to the turning movement of the warp beam which is facilitated by the yielding of the springs. By mounting the whip roll on pivoted arms it yields when the pull on the warp threads is increased owing to the beam getting less in diameter. This yielding reduces the tension on "the chains which encircle the necks or ruffics of the warp beam and (mu sequently allow the latter to turn more freely than. i3-W0l1ll otherwise do if no such relief were granted.

pressure of the spring a! Wheel elaim as my invention snol desire to secure by Letters Peient in the Uniieci -.States is:-'- f 1. In e 10pm Weighting motion, the cembinetion, with a. warp beam, flexible connections Wound on the neck pf the Warp -bean1, ,piv0'te(l upper. and lower levers e011- riectecl at on'eeml to the respective ends of the said flexible connections, a connection between tlki) other ends of (he said upper and. lower levers, s whip roll carried by the said upper levers, and springs which depress the said lower levers and stretch the Warp; of means fur autenmtically raising; the said lower lovers n predetermined iniervals against the pressure of the said springs, thereby temporarily relieving the normal tension of the wary threads.

' 'J'Zln reloom weighting motion, the cons binetion, with a. Warp beain iiexible cennections wound 0n the neck 10% the Warp beam, pivoted. upper and lower levers con nected at one end to the respective ends of the said flexible connections, a connection between the other ends of the said upper and lower levers, a Whip roll carried by the said upper levers, and springs which depress ihe said lower levels and stretch the warp; of i l'oek slisft, arms secured on the rockshaft, means operatively connecting the said ii-ins with the said lower levers, and driving devices for operating tlie'rock-slieft at predetermined intervals, thereby raising the lower levers against the pressure of; the said springs and iempersrily relieving the normal tension on the Warp threads.

in testimony wliereof I siiix my signature.

VVILLIAJlYX GLEDi-HLL. 

